Home Posts filed under Pre tone
Showing posts with label Pre tone. Show all posts
Showing posts with label Pre tone. Show all posts

Friday, May 25, 2007

Pre Tone Control Stereo by IC NE5532

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Monday, May 7, 2007

Thursday, May 3, 2007

5 Transister (C945) tone control mono.

This circuit Tone Control Mono, 4 Transister : C945 = 5 part.
Supply Volt min 12V 80ma.
Easy to build, PCB small.

circuit 5 Transister (C945) tone control mono.

PCB 5 Transister (C945) tone control mono.
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4 Transister (C945) tone control mono.

This circuit Tone Control Mono, 4 Transister : C945 = 4 part.
Supply Volt min 12V 80ma.
Easy to build, PCB small.

circuit 4 Transister (C945) tone control mono.
PCB 4 Transister (C945) tone control mono.
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3 Transister (C945) tone control mono.

This circuit Tone Control Mono, 3 Transister : C945 = 3 part.
Supply Volt min 12V <80mA .
Easy to build, PCB small.

Circuit 3 Transister (C945) tone control mono.
PCB 3 Transister (C945) tone control mono.
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2 Transister (C945) tone control Stereo.

This circuit Tone Control Stereo, 2 Transister : C945 = 2 part.
Supply Volt min 12V <80mA .
Easy to build, PCB small.
Circuit 2 Transister (C945) tone control Stereo.

PCB 2 Transister (C945) tone control Stereo.
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2 Transister (C945) tone control mono.

This circuit Tone Control Mono, 2 Transister : C945 = 2 part.
Supply Volt min 12V <50mA .
Easy to build, PCB small.
Circuit 2 Transister tone control mono.
PCB 2 Transister tone control mono.
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Tone control circuits

Tone control circuits are electronic circuits used to modify an audio signal before it is fed to speakers, headphones or recording devices by way of an amplifier. They are akin to and sometimes called filters. In their most basic form, they elevate or attenuate the high and low frequencies of the signal. This is called treble or bass boost or cut, respectively, in the vernacular of audio engineering. More elaborate tone control circuits can elevate or attenuate the middle range of frequencies too. Really elaborate tone controls provide elevation or attenuation in 1/3 octave bands spanning from approximately 30 Hz to 18 kHz. These units are called graphic equalizers because their controls are in the form of sliders that are arranged so as to graphically display the amount of boost or cut being applied at any frequency of interest. The most elaborate units can control not only the boost and cut but also the frequency at which the boost and cut takes place and the bandwidth of the control's action. These are called parametric equalizers because they control all of the equalization parameters.

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Saturday, April 28, 2007

Pre Tone Control Circuit (Transistor)

Notes:
Based on the classic Baxendall tone control circuit, this provides a maximum cut and boost of around 10dB at 10K and 50Hz. As the controls are passive, the last transistor provides a slight boost. The output is designed to feed an amplifier with input impedance of 10k to 250k. Both tone controls should be linear potentiometers.Source : http://www.mitedu.freeserve.co.uk/Circuits/Audio/t-ctrl.htm
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